Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5639384 | Apparatus and method for improving gas backwash in lateral underdrains | Marvin A. Brown, Richard Hsieh | 1997-06-17 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5639384 | Apparatus and method for improving gas backwash in lateral underdrains | Marvin A. Brown, Richard Hsieh | 1997-06-17 |